Kneading and mixing machine



G. B. EGGERT'.

KNEAI JINGAND MIXING MACHINE. APPLICATON FILED MN- 18. 1922'- 1,411,610. Patented Apr. 4, 1922.

2 SHEETS-SHEET I.

G. B. EGGERT,

KNEADING AND'MI XING MACHINE.

APPLICATION FILED JAN-18,1922- Patented Apr. 4, 1922.

2 SHEETS-SHEET 2.

Fig. 6

UNITED STATES PATENT OFFICE.

GUSTAV BERNHARI) EGGERT, OF SAGINAW, MICHIGAN, ASSIGNOR T BAKER- RERKINS MANUFACTURING CORPORATION, OF SAGINAW, MICHIGAN.

KNEADING AND MIXING MACHINE.

Specification of Letters Patent.

Patented Apiat, 1922.

To all to 7mm z'tmay concern.

Be it known that 1', GUSTAV BERNI-IARD Eecnnr, a citizen of the United States, re siding at Saginaw, in the county of Saginaw and State of Michigan, have invented new and useful Improvements in Kneading and Mixing Machines, of whichthe following is a specification.

My invention relates to kneading andmim ing machines, the trough of which is upright during their operation, has an open top, closed, while in this position, by a stationary cover, and is emptied by being tilted, and has for its object to provide means for auto matically closing the interstices between the cover and the top of the trough, and at the same time to use part of these means,.when the troughis tilted, for. automatically removing particles of the mass under treatment thrown against the inner side of they cover by the action of. the heaters. and adhering thereto, and letting them. drop into the trough.

The invention will first be described in connectionwith the accompanying drawings andthen. defined. in theattaohed claims.

Fig. 1. shows an-example of the manner in which the cover may be mounted 011 the standards supporting it.

Fig, 2. is a vertical section of. the cover andof the top of the troughin a. line drawn vertically to the axis of the beater-shaft, demonstrating the construction of the frontbar closing the interstices between the cover and the trough at the front of the latter, which, when tilted, is lowest, and of the backbar with scraper, closing the interstices between the cover and. the trough at the back of the latter, which, when tilted, is highest, and removing during this time small portions of the mixed and kneaded massad? hering to the inner surface of. the cover.

Fig, 3 isavertical seotionofthecover and ofthetop of the trough in a linedrawn parallel to the axi ofthe beatenshaft, showing the arrangement for closing the interstices between the cover and the top:- of the. side walls of the trough.

. Fig. 4c. is an.-enlarged:verticalcross section ofthe frontbar, and Fig. 5 of the backbar. with;the scraper, showing their construction more, clearly and; the manner in which they aremounted on the top. flangeof the front, respectively back. of the middle part, the body, ofrthe trough. Fig. 6 isa; section on line 66 of Fig. l and demonstrates how the bars are fixed to the ide walls of the trough, and the latter to the side flanges of its body.

Fig. 7 shows the arrangement for regulating the position of the scraper in regard to the cover, and Fig. 8 that of the latter in regard to the top of the trough.

Like numerals of reference denote in all figures like parts serving the same or a similar purpose.

Thenumeral 1 indicates the-trough of the machine in its upright,.and 1* in its tilted position. The cover 2 closes the open. top of the trough 1 when upright, and is supported by beams, rods, brackets or the like generally fixed either to the framework of the machine or to the ceiling of the room, in which the machine is situated; in Fig. l the cover 2 is mounted on standards 3 fixed in bosses provided on the housing a of the driving gear of the machine. The trough is tilted on the beater-shaft, 5, which is revolubly upported in the, ordinary manner in bearings-provided inthe framework 7 of the machine. The trough is usually composed of the body 8, cylindrical at its bottom and provided all round its edges with wide flanges: 9 at the front, lOat the back and 11 at. the sides, and of the flat side wall-$ 12, which are fixed by the bolts 13 to the fianges ll of the body 8.

For closing the interstices between the cover 2 and the side walls 12,. the top edges of the latter are shaped as arcs, the centers of which lie in the axis of the shaft 5, while at least those parts-of the cover2, which are directly situated above the sidewalls 12, form sections of a cylinder, the centerline of which is identical. with the same axis. The radius of this cylinder is so arranged in length in regard tothe radii of the arcs of the side wallslfl, that the latter pass closely, but easily. underneath. the cover 2, whenthe troughl istilted.

In order to close the interstice between the top'of the front of the trough 1 and the cover 2, I preferably construct the latter of twopieces, the heavier, and longer main part. 14 overlapping the back of the trough and extending at its opposite side so far that its edge is directly above the upper front walli15of the mainbody 8, and the shorter, lighter and, somewhat springy front part 1.6 riveted. on. top. ofv the front end of: the mainpart 1.4.,overlapping the front of the from the tilted into the u n'ight position' I mount on the front flange S) a triangular bar, the frontbar 17, extending the whole distance between the side walls 12, one side of the triangle being fixed to the flange 9 by the bolts 18, the second side being upright and at its top closely fitting to the surface of the front edge of the mainpart 14 up to its upper rim, and the third, slant-- ing side extending from the top of the second side to about the outer end of the flange 9. The arrangement is such that, when the trough is upright, the top of the frontbar 17 is'pressed tightly against the edge of the main part 14 of the cover 2. Both. the frontbar 17 and the edge of the main part 14, acting together, serve thus as stop, when the trough is moved from the tilted position 1* into its working position 1, and keep its front completely closed when in the latter. In order to strengthen this construction, 1. preferably provide the frontbar 1.7 at its top with the bar-like ridge 19 instead of an, acute angle, the side of theridge, pointing toward the front of the cover 2, fitting closely to the surface of the front edge of its main part 1.4, and its upper side to the front part 16. The upright side of the bar 17 is preferahly arranged flush with the inner-surface of the front wall 15 of the trough 1, and its slanting side about parallel. to and at a suitable distance below the front part 16 of the cover 2.

The interstice between the cover 2 and the trough 1 at the back of the latter is closed by the scraper 20, which extends all the width between the side walls 12 and fastimed to a triangular bar, the backbar 21. which. has the same length and is fixed with its underside by the bolts 22 to the back flange 10. The longer slanting; side of the bar 21 is preferably arranged parallel to and at a short distance from the cover 2 and meets with its lower end the outer edge of flange .10. while the angle at its top is 'cut away a little in order to allow some play for the scraper 20. The latter is preferably made of spring steel and fastened to the upright side of the backbar 21 by means of the flat metal bar and the fiat-headed screws 24 passing through the openings 253 in the scraper 20 and holding thelattel" in its place between the backbar 2i and the ba r 23 when duly tightened. The upright sidcs of the liackbar 21. the bar 22 and the lower part of the scraper are so arranged, that the outer surface of the bar .2 is flush with the inner surface ofthe back wall 26 of the trough 1.. The upper part of the scraper forms part of a, cylinder, the centerline of which is identical with the axis of the blade shaft 5. In order to get the best results from the scraper 20, it is necessary to regulate its position in regard to thd cover ac cording to requirements. For this purpose, I preferably provide in the scraper 20 vertically elongated openings 25, as shown in Fig. 7, and leave sufhcient play between the top surface of the flange 10 and the lower edge of the scraper 20, which thus, after loosening the screws 24, may be raised or lowered at will within the limits of the construction. The ends of the frontbar 17 and of the backbar 21 are flush with the side flanges 11 of the mainbody 8 of the trough 1 and fixed to its side walls 12 by means of the bolts 27, Fig. 6.

It is obvious, that the frontbar 17 as well. as the liiackbar 21 may be made of one piece with the trough 1, that the outside surface of these bars may have any'shape, as long as it does not foul the cover 2, when moved. and that the front part 16 of the cover 2 may be omitted, without leaving the scope of my invention. i

In the construction shown in Figs. 1, 3 and 8 each side of the main part 14 of the cover 2 is carried and strengthened by an angle iron 28 bent like the same and riveted thereto, the side of the angle iron standingout from the cover being placed closely to the ribs of the corresponding side walls 12. The cover 2 is supported on the rod-like Standards 3 by means of the tubes 29 forming one piece with the brackets 30 rigidly fixedto the angle irons 28. The tubes 29 slide on the screw threaded upper parts of the standards 3 and are held in position thereon by the screw nuts 31 and 32 arranged at each end of the tubes. The lower nuts, 31, carry the cover, and the upper ones, 32, fix it thereon; by altering the position of these nuts, the distance of the 'cover2 from the top of the trough 1 is regulated.

I claim:

1. In a machine of the kind described. in combination with an open trough upright during work and emptied by being tilted. a stationary cover overlapping the two side walls and the back wall of the said trough when upright. the front edge of the said cover being situated directly above the front wall of the latter, and a bar provided on top of this front wall and extending between the two side walls of the said trough, the inner surface of the upper part of the said bar fitting closely to the surface of the front edge of the said cover.

2. In a machine of the kind described, in combination with an 0 en trough upright during work and emptied by being tilted, a stationary cover consisting of a heavier and longer main part, overlapping the two side walls and the back and wall and situ- V ated with its front edge directly above the front wall of the said trough when upright, and of ,a lighter and shorter front part rigidly fixed to the top of the front end of the said main part, and a triangular bar extending between the two side walls of the said trough at its front, one side of the said bar being fixed to the top of the front wall of the said trough, the second side being flush with the inner surface of this wall, extending upwards to the front part of the said cover and fitting with its upper part closely to the front edge of the main part of the same, and the third side slanting downward parallel to and at some distance from the former. a

3. In a machine of the kind described, in

combination with an open trough upright during work and emptied by being tilted, a stationary cover consisting of a heavier and longer main part, overlapping the two side walls and the back wall and situated. with its front edge directly above the front wall of the said trough when upright, and of a lighter and shorter "front part rigidly fixed to the top of the front end of its main part, a triangular bar extending between the two side walls of the said trough at its front and having its top angle cut oil the under side of the said bar being fixed to the top of the front wall of the said trough, its upright side being flush with the inner surface of this wall, and its slanting side being parallel to and at some distance from the front part of the said cover, and a barlike ridge arranged in place of the cut-off angle of the said bar so, that its side pointing inside the said trough fits closely to the front edge of the main part of the said cover, and its top side fits to the under side of the front part of the same.

4. In a machine of the kind described, in combination with an open trough upright during work and emptied by being tilted, a shaft on which the said trough is turned, a stationary cover overlapping the latter, when upright, at all sides, the top edges of the side walls of the said trough and the inner surface of the said cover forming arcs coaxial to the said shaft and put so near to each other as to close the interstices between the same, and a scraper provided at the top of the back wall of the said trough and so arranged as to pass along the arc shaped inner surface of the said cover, when the said trough is tilted.

In a machine'of the kind described, in combination with an open trough upright during work and emptied by being tilted, a shaft on which the said trough is turned, a stationary cover overlapping the latter, when upright, at all sides, the top edges of the side *allsof the said trough and the inner surface of the said cover forming arcs coaxial to the said shaft and placed so near to each other as to close the interstices between the same,

a scraper provided at the top of the back wall of the said trough and so arranged as to close the interstice between the latter and the said cover and to remove particles ad hering to the inner surface of the latter, when the said trough is tilted, and means for regulating the position of the top edge of the said scraper in regard to the inner surface of the said cover.

6. In a machine of the kind described, in combination with an open trough upright during work and emptied by being tilted, a shaft on'which the said trough is turned, a stationary cover overlapping the latter, when upright, at all sides, the top edges of the side walls of the said trough and the inner surface of the said cover forming arcs coaxial to the said shaft and placed so near to each other as to close the interstices between the same, a triangular bar extending between the two side walls of thesaid trough at its back, the underside of the said bar being fixed to the top of the back wall of the said trough, its slanting side being parallel to and at some distance from the back part of the said cover, and its upright side being provided with screw threaded holes, fiat-headed screws fitting in these holes, a flat bar provided with round openings for the said screws and having the same length as the said triangular bar, a. scraper made of springy steel of the same length as the said bar and vertically elongated openings provided in the lower half of the said scraper and corresponding in width to the diameter of the openings in the said flat bar, the said scraper being fixed between the said flat bar and the upright side of the said triangular bar by the said screws. 4

7. In a machine of the kind described, in combination with an open trough upright during work and emptied by being tilted, an arc-shapedstationary cover overlapping the two side walls and the back wall and situated with its front edge directly above the front wall of the said trough, when upright, a bar provided on top of the front wall and extending between the two side walls of the said trough, the inner surface of the upper part of the said bar fitting closely to the front edge of the said cover, and a scraper arranged on top of the back wall and extending between the two side walls of the said trough so as to pass along the inner surface of the said are shaped cover, when the said trough is tilted.

8. In a machine of the kind described, in combination, an open trough adapted to be tilted on the blade shaft and composed of a flanged body and of two flat side walls rigidly connected to the former and having top edges forming arcs coaxial to the said shaft, a stationary cover consisting of a heavier and longer main part shaped in correspondence to these arcs, overlapping the side walls a off, a bar-like ridge arranged in place of the latter so, that its side pointing inside the said trough fits closely to the front edge of the main part of the said cover, and its topside fits to the under surface of the front part of the same, a second triangular bar fixed to the back flange of the said trough and extending between the side walls of the same, a scraper having the same length as the said bar and arranged at the latter so as to pass tightly along the arc-shaped inner surface of the main part of the said cover, when the trough is tilted, and means for regulating the posi tion of the said scraper on the said bar in regard to the said cover.

9, In a machine of the kind described, in

combination with an open trough upright during work and emptied by being tilted, an arc-shaped stationary cover, overla ping the two side Walls andthe back wall and situated with its front edge directly above the front wall of the said trough, when upright, angle irons bent like the arch of and fixed to the said cover, one to each side thereof, stationary standards screw-threaded in their upper part, tubes fixed to the said angle irons and sliding on the threaded part of the said standards, screw-nuts meshing with the screw-threaded parts of the latter, two for each standard, one placed at one side of the said tube for supporting the said cover, and the second one at the opposite side thereof for fixing it thereon, atbar provided on the to ofthe front wall of the said trough an 1 fitting with the inner surface of its upper part closely to the front edge of the said cover, and a scraper arranged on the top of the back wall of the said trough so as to pass along the inner arc-shaped surface of the said cover, when the said trough is tilted.

GUSTAV BERNHARD EGGER i Certificate cf Ccrrection.

It is hereby certified that in Letters Patent No. 1,411,610, granted April 4, 1922 upon the application of Gustav Bernhard Eggert, of Saginaw, Michigan, for an improvement in Kneading and Mixing Machines, an error appears in the printed specification requiring correction as follows: Page 2, line 129, claim 2, strike out the Word and, second occurrence; and that the said Letters Patent should be read with this correction thereinthat the same may conform to the record of the case in the Patent Oflice.

Signed and sealed this 16th day of May, A, 1)., 1922.

[SEAL] I KARL FENNING,

Acting Commissioner 0' Patents. 

